Anatomy of the Eye - Frank's Hospital Workshop · Key anatomy of • Cornea: protective outer...

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Anatomy of the Eye Health Care Technology Unit ORBIS Flying Eye Hospital

Transcript of Anatomy of the Eye - Frank's Hospital Workshop · Key anatomy of • Cornea: protective outer...

Page 1: Anatomy of the Eye - Frank's Hospital Workshop · Key anatomy of • Cornea: protective outer layer, triggers blink reflex, tear duct secretion, and 2/3 of total refraction. • Aqueous

Anatomy of the Eye

Health Care Technology UnitORBIS Flying Eye Hospital

Page 2: Anatomy of the Eye - Frank's Hospital Workshop · Key anatomy of • Cornea: protective outer layer, triggers blink reflex, tear duct secretion, and 2/3 of total refraction. • Aqueous

Macula

Aqueous Humor

Iris

Cornea

Lens

Vitreous Humor

Optic Nerve

Retina

Choroid

Sclera

Anatomy of the eye

Page 3: Anatomy of the Eye - Frank's Hospital Workshop · Key anatomy of • Cornea: protective outer layer, triggers blink reflex, tear duct secretion, and 2/3 of total refraction. • Aqueous

Key anatomy of• Cornea : protective outer layer, triggers blink reflex,

tear duct secretion, and 2/3 of total refraction.

• Aqueous Humor: clear fluid behind the cornea.

• Iris: (pupil) constricts and dilates

• Retina : coats the back of the eye, image sensor (specialized cells: cones and rods)

• Lens : flexible, transparent, provides 1/3 refraction that focuses an image on the retina.

• Vitreous Humor: semi-gelatinous material filling the volume between the lens and the retina.

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anterior segment

posterior segment

anterior chamber

posterior chamber

Anatomy of the eye

Page 5: Anatomy of the Eye - Frank's Hospital Workshop · Key anatomy of • Cornea: protective outer layer, triggers blink reflex, tear duct secretion, and 2/3 of total refraction. • Aqueous

Lens

zonular fibers

Iris

cornea

ciliary process

ciliary muscle

capsula

Aqueous humor

Anatomy of the eye: Anterior segment

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epithelium

Bowman’ s membrane

Descemet’s membranestroma

endothelium 1 cell thickness (3 à 4000 cells/mm2 when born)

Thickness = 500 µm at center, 700 to 800 µm on sides

Dioptric power = 40 (total eye = 60 diopters)

Epithelium regenerates every 2 to 8 daysEndothelium is an unicellular layer that never regenerates (3 to 4000 cells /mm2 at birth)

Anatomy of the eye (detail): Cornea (5 layers)

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vitreous

sclera

limbus

optic disc foveamacula

optic nerve

choroid

retina (detached)

ora serrata

pars plana

Anatomy of the eye: Posterior segment

Reproduced from Alcon Training Material

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Ora serrata = anterior limit of retina

vitreousbase

Anatomy of the eye (detail): Posterior segment

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Anatomic Macula

Reproduced from Basic Clinical Science Course, Foundation of the American Academy of Ophthalmology. 2003 - 2004.

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1. Cornea & Cataract

2. Retina & VitreousCataract Corneal Diseases

Retinal Detachment Macular Diseases Diabetic Retinopathy

Six sub-specialties of Ophthalmology

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4. Oculoplastics (trauma, birth defects, tumors, cosmetics)

5. Pediatrics & Strabismus

6. Neuro-ophthalmology (optic disk, optic nerve, brain)

3. Glaucoma

Six sub-specialties of ophthalmology

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Acknowledgements

• ALCON Laboratories

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